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EWG's Tap Water Database — 2019 UPDATE

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Simazine

City of Georgetown

Simazine is a hormone-disrupting herbicide related to atrazine. It affects the male and female reproductive systems. In studies of laboratory animals, simazine increases blood levels of estrogen, decreases prolactin and progesterone, and causes mammary and ovarian tumors.

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND30ND
2013ND30ND
2014ND30ND
2015ND60ND
2016ND40ND
2017ND30ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for simazine was defined by EWG based on epidemiological studies of human exposure to atrazine in drinking water. This health guideline protects against harm to the developing fetus, harm to the reproductive system and hormone disruption.

EPA Maximum Contaminant
Level (MCL) 4 ppb

The legal limit for simazine, established in 1992, was based on toxicity studies in laboratory animals conducted in the 1980s. This limit does not fully protect against harm to the reproductive system, harm to the developing fetus, and hormone disruption.

ppb = parts per billion

All test results

Date Lab ID Result
2012-04-12AB86784ND
2012-04-12AB86786ND
2012-04-12AB86785ND
2013-02-121302340003ND
2013-03-251303839003ND
2013-06-03Q1301827013ND
2014-05-06AC53203ND
2014-05-06AC53201ND
2014-05-06AC53202ND
2015-03-05AC83068ND
2015-03-05AC83066ND
2015-03-05AC83069ND
2015-06-18AC96552ND
2015-09-15AD07189ND
2015-12-10AD16658ND
2016-04-21AD33788ND
2016-04-21AD33791ND
2016-04-21AD33789ND
2016-04-21AD33787ND
2017-01-23AD66235ND
2017-01-23AD66242ND
2017-01-23AD66236ND